Choosing the perfect domain name is a tough thing to do considering the billions of websites on the web these days and the fact that pretty much all the good, short and easy to remember domain names are unavailable. One of the main things you should look for is relevance. I strongly recommend you to have your name or what you do in the name of the website. have the word "antiques" in the name.That way when people are searching for services like yours, they will have an idea where to look for you.
I know it is hard, but try to find a short and memorable domain name. Or at least as short as possilbe. That way it will be much easier to remember by your customers.
You can also put your location in the name-like..antiques-tampa or tampaantiquestore...something like that.
You can check the domain availability at this website: http://www.instantdomainsearch.com
If you need more help, try this website: http://www.surftown.se